Dies.



, R. L. WILCOX.

'DIES.

APPLICATION FILED APR. 6. 19M

1,147,994. v Patented July 27, 1915. 4

ii EX...

- WITNESSES: WEN, v I

/Q/Mwab By I a Arm/mu UNITED STATES PATENT OFFICE.

310mm) LESTER wincox, or WATERBURY, CONNECTICUT, ASSIGNOR are THE warns BURY runner. FOUNDRY AND MACHINE COMPANY, or WATERBURY, CONNECTI- OUT, A CORPORATION OF CONNECTICUT.

DIES.

Specification of Letters Patent. P t t July 23: 15,

-Application filed April 6, 1914. Serial No. 829,750.

'To all whom it may concern:

. Be it known that I, RICHARD LESTER W11.- cox,-a citizen of the-United States, residing at Waterbury, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Dies, of which the following is a specification, reference being bad therein to the accompanying drawings.

My 'nvention'relates to new and useful improvements in dies, referring more particularly to dies for heading or like ma- It is the object of my invention, among other things, to construct dies of this char- I acter that will be serviceable for a much longer period than the dies heretofore made,

constructed of materially less metal, and at a lower cost. 7

To these, and other ends, my invention consists in the dies constructed and operating substantially as described, and more particularly pointed outin the claims.

Referring to the drawings, in which like numerals of reference designate like parts in the several figures; Figure is a perspective view ofone set of dies; Fig. 2 is a frag-- mentary view of a set of the dies with some.

of the parts immediately adjacent thereto, as they are mounted in a heading machine; and Fig. 3 is a transverse sectional view of i the parts shown in Fig. 2 taken upon line length of the die with a recess at one end for the head, in its entirety, the groove and recess being the same shape as the finished blank.

In the process of heading blanks, the wire is fed between the dies the required distance, that is, with one end thereof projecting beyond the end of the dies, which are then brought together so that the opposite faces thereof contact with each other. When so united they are moved laterally and the rear end of the die cuts the wire within the dies from the rod length, and subsequently the punches upset that portion of the projecting wire to form a head thereon of substantially the same shape as the recem in the end of the die. ,By this practice the ends of the dies do all of the work, the} rear end cutting and the front end withstanding the shock required to'displace or upset the wire rod to;

form the head. Asthe-dies wear they are thrown away and new ones substituted. The dies most frequently wear out and break at that end where the head is formed, and are therefore discarded, while the so-called cutting end is in perfect condition. These, and other objections, I have overcome by making the dies of interchangeable sections that are severally designated'in the drawings by the reference numerals land 2, the former being the head section and considerably shorter than the latter or cutting section. One end of the head section is provided with recesses 3 at the end of the grooves 4 to form the blank head. Sections 1, being those that more frequently, break. and wear out, are comparatively short in length, and therefore require much less stock than a die of the combined length of both sections, and are necessarily produced at a very much lower labor "cost, and can be discarded and a new section substituted without casting aside the ,entire die, and again, the sections 1 can be utilized in the, manufacture of blanks of various lengths by substituting new sections 2 of different lengths, a practice not heretofore possible, a die being required for each length of blank. The sections 2 can also be turned end for end so that eight cutting off surfaces are provided instead of four, as at present, thereby doubling the life of this portion of the die.

The dies are usually mounted in a die block 6 and movable therebetween. This die block is secured in the bed of a header, designated in the drawing by the numeral 6. A hardened backing block 7 is usually inserted in the bed to take the strain of the heading operation oil the bed.

On either side of the dies, and between the die block 5 and cover 18, are the filler plates 8 and 9. Contacting with the filler plate 8 is a yielding plate 10, mounted within a g i recess 11 in the bed 6, and movedin one di-' rection by one or more springs 12.

Engaging the lfiller block 9 is a pusher block 13,- against which abut the ends of the plungers 14. During the feeding operation the dies are in the position shown by full "lines in- F ig.- 2, the recesses 4.- in themeeting shown, and shifted to a axes of said recesses Pare coincident with ..15

vfaces of the dies being opposite the opening 15, through which the wire is fed. At the termination of the feeding operationthe dies are moved laterally through the action of the plungers 14, by means not herein a position wherein the the broken-line 16 (Fig- 2) During this lateral shifting. of the. dies the wire is out i off between the rear end of the sections 2 and I ,the cutter block 17.

' '20 '2 at which time thewire abuts against the face of" the cutter 17. ..The (11 The heading operation takes place when the'recesses are coincident with the line 16,

'es are returned to their voriginal position to have the blank ejected andreceive another wire length by the withdrawal of the plungers 14 and the action of the springs 12.

While I have illustrated and described the general method of mounting and operating these dies=i1l a'headin notdesire to be nnderstoo as limiting the use of my dies to such mechanism, or in the manner described, the invention relating to v the dies alone,.and not to any surrounding I claim as new and desire to secure by Letters mechanism with which they may be associated, or the method of their use.

Having described my invention, what I Patent, is

each of said sections having grooves'in the- 1. Dies for; a header or similar use, constructed of two separate sections placed together with the end of onesection against the other section so as to form a single die,

sides thereof that form an extension of the grooves in the other section, one of said sections having a recess in one end thereof for forming the head of the blank and extend{ F ing only art way through the section, which 'is of su cient thickness and size to .Withstand the shock,pressure and pounding'of ,the pun'chesagainst it without crystallizing.

2. Dies for a header or similar use, having a groove in one face thereof, constructed of-a' heading section and a cutting ofi secf machine, I do ing into a heading recess that extends only partly through said section.

3. Dies fora header onsimilar use, having a groove in one face thereof, constructed of heading section and a-cutting olf section,

the latter being relatively longer than the A former and capable ofbeing reversed end for end, said sections being placed in such relation -to each otherthat the end of one section is against the end of'the other sec tion with the groove of one section forming an extension of the tion, said cutting 0 section having a headmg recess in its outer end that extends only part way through the-section. v 4:. Dies fora header. or similar use, cons structed of aheadingsection and a cutting off section, substantiallyrectangular in cross section with a groove in each side thereof parallel to its length, the grooves in the headving-section terminating in an enlarged head recess, these sections being placed in such relation to each other that theend of one section is against the end of the other sec- .tion with the groove in the side of one section forming a continuation of the groove in e the side of the other section. 5. Dies for aheader or similar use, constructed of two sections, each-being of substantially'the same shape and size in cross section, one of said sections having a headmg recess 111 one end thereof, and both sections beingso placed in relation to each other, that one section is substantially an bow: of the other sec- 4 extension 01E the other section, and combined are substantially the same length as" the blank, headed therein, with the head of.

said blank'formed at the outer end of one section and the blank cut ofl: from the wire length by the opposite end of the other section.

In testimony whereof I aflix my signaturev in presence of two witnesses;

RICHARD LESTER WILCOX. Witnessesz' v Geo. 'I. Bum O, O, Pnmamn. 

